.page-home {
  --home-hero-lines: rgba(255, 255, 255, 0.14);
}

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

/* 首屏：章节预览 */
.page-home .home-hero {
  background: var(--c-deep-space);
  color: var(--c-white);
  padding: var(--space-5) 0 var(--space-7);
  position: relative;
  overflow: hidden;
}

.page-home .home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-home .home-hero__topline {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--home-hero-lines);
  margin-bottom: var(--space-6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.55);
}

.page-home .home-hero__topline span:first-child {
  color: var(--c-white);
  font-weight: 500;
}

.page-home .home-hero__grid {
  position: relative;
  display: grid;
  gap: var(--space-6);
  padding-top: var(--space-4);
  z-index: 1;
}

.page-home .home-hero__toc {
  border-left: 2px solid var(--c-accent);
  padding-left: var(--space-5);
}

.page-home .home-hero__toc-title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.45);
  text-transform: uppercase;
}

.page-home .home-hero__toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .home-hero__toc li {
  margin-bottom: var(--space-4);
}

.page-home .home-hero__toc li:last-child {
  margin-bottom: 0;
}

.page-home .home-hero__toc a {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease;
}

.page-home .home-hero__toc a:hover,
.page-home .home-hero__toc a:focus {
  color: var(--c-accent);
}

.page-home .home-hero__toc-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
}

.page-home .home-hero__eyebrow {
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-prairie);
  text-transform: uppercase;
}

.page-home .home-hero h1 {
  font-size: clamp(2.25rem, 8vw, 4rem);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-5);
}

.page-home .home-hero__lead {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.72);
  border-left: 2px solid var(--c-prairie);
  padding-left: var(--space-5);
  margin: 0 0 var(--space-6);
}

.page-home .home-hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.page-home .home-hero__ghost {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 2px;
  font-size: 15px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-home .home-hero__ghost:hover,
.page-home .home-hero__ghost:focus {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.page-home .home-hero__decor {
  display: none;
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 280px;
  pointer-events: none;
  z-index: 0;
}

.page-home .home-hero__visual {
  margin-top: var(--space-7);
  position: relative;
  z-index: 1;
}

.page-home .home-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  outline: 1px solid rgba(255, 255, 255, 0.12);
  outline-offset: -1px;
}

.page-home .home-hero__caption {
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.04em;
}

/* 共用章节眉题 */
.page-home .home-section__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  flex-wrap: wrap;
  border-bottom: 1px solid var(--c-light-gray);
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-6);
}

.page-home .home-section__head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-ink);
}

.page-home .home-section__desc {
  margin: 0;
  color: var(--c-mid-gray);
  font-size: 15px;
  line-height: 1.6;
}

/* 最新版本更新 */
.page-home .home-update {
  background: var(--c-white);
  padding: var(--space-7) 0;
}

.page-home .home-update__layout {
  display: grid;
  gap: var(--space-6);
}

.page-home .home-update__side {
  border-top: 1px solid var(--c-light-gray);
  padding-top: var(--space-5);
}

.page-home .home-update__version {
  display: block;
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-deep-space);
  margin-bottom: var(--space-3);
}

.page-home .home-update__side p {
  font-size: 14px;
  color: var(--c-mid-gray);
  line-height: 1.7;
  margin: 0;
}

.page-home .home-update__item {
  border-left: 2px solid var(--c-accent);
  padding-left: var(--space-6);
}

.page-home .home-update__item h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0 0 var(--space-4);
  color: var(--c-deep-space);
}

.page-home .home-update__item ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .home-update__item li {
  position: relative;
  padding-left: var(--space-5);
  margin-bottom: var(--space-3);
  color: var(--c-ink);
  line-height: 1.7;
  font-size: 16px;
}

.page-home .home-update__item li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 8px;
  background: var(--c-accent);
}

.page-home .home-update__figure {
  margin: var(--space-6) 0 0;
}

.page-home .home-update__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  outline: 1px solid var(--c-light-gray);
  outline-offset: -1px;
}

/* 快速入口 */
.page-home .home-quick {
  background: var(--c-dark-gray);
  padding: var(--space-7) 0;
}

.page-home .home-quick .home-section__head {
  border-color: rgba(255, 255, 255, 0.12);
}

.page-home .home-quick .home-section__head h2 {
  color: var(--c-white);
}

.page-home .home-quick .home-section__desc {
  color: rgba(255, 255, 255, 0.55);
}

.page-home .home-quick__grid {
  display: grid;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.page-home .home-quick__card {
  background: var(--c-white);
  color: var(--c-ink);
  padding: var(--space-6);
}

.page-home .home-quick__card h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--c-deep-space);
  margin: 0 0 var(--space-3);
}

.page-home .home-quick__desc {
  color: var(--c-mid-gray);
  font-size: 15px;
  line-height: 1.7;
  margin: 0 0 var(--space-5);
}

.page-home .home-quick__features {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.page-home .home-quick__features li {
  font-size: 14px;
  color: var(--c-ink);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--c-light-gray);
}

.page-home .home-quick__card details {
  margin-top: var(--space-5);
  border-top: 1px solid var(--c-light-gray);
  padding-top: var(--space-4);
}

.page-home .home-quick__card summary {
  cursor: pointer;
  color: var(--c-deep-space);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.page-home .home-quick__card summary:hover {
  color: var(--c-accent);
}

.page-home .home-quick__more {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-home .home-quick__more li {
  font-size: 14px;
  color: var(--c-mid-gray);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--c-light-gray);
}

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

.page-home .home-quick__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  outline: 1px solid rgba(255, 255, 255, 0.12);
  outline-offset: -1px;
}

/* 内容索引 */
.page-home .home-index {
  background: var(--c-white);
  padding: var(--space-7) 0;
}

.page-home .home-index__grid {
  display: grid;
  gap: var(--space-6);
}

.page-home .home-index__lead {
  border-left: 2px solid var(--c-prairie);
  padding-left: var(--space-5);
}

.page-home .home-index__lead p {
  color: var(--c-mid-gray);
  line-height: 1.9;
  font-size: 15px;
  margin: 0 0 var(--space-4);
}

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

.page-home .home-index__nav {
  display: grid;
  gap: var(--space-2);
}

.page-home .home-index__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: var(--space-2) var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--c-light-gray);
  text-decoration: none;
  transition: box-shadow 0.2s ease;
}

.page-home .home-index__item:hover,
.page-home .home-index__item:focus {
  box-shadow: 0 1px 0 var(--c-deep-space);
}

.page-home .home-index__num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-accent);
}

.page-home .home-index__name {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-home .home-index__desc {
  grid-column: 2;
  font-size: 13px;
  color: var(--c-mid-gray);
  text-align: left;
}

.page-home .home-index__bottom {
  margin-top: var(--space-6);
}

.page-home .home-index__trust {
  font-size: 14px;
  color: var(--c-mid-gray);
  line-height: 1.8;
  border-top: 1px solid var(--c-light-gray);
  padding-top: var(--space-5);
  margin: var(--space-5) 0 0;
  max-width: 38em;
}

.page-home .home-index__figure {
  margin: var(--space-6) 0 0;
}

.page-home .home-index__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  outline: 1px solid var(--c-light-gray);
  outline-offset: -1px;
}

@media (min-width: 768px) {
  .page-home .home-hero {
    padding: var(--space-7) 0;
  }

  .page-home .home-hero__topline {
    margin-bottom: var(--space-7);
  }

  .page-home .home-hero__grid {
    grid-template-columns: minmax(180px, 1fr) 2.2fr;
    gap: var(--space-7);
    align-items: start;
    padding-top: 0;
  }

  .page-home .home-hero__toc {
    position: sticky;
    top: var(--space-7);
  }

  .page-home .home-hero__lead {
    font-size: 17px;
    max-width: 42em;
  }

  .page-home .home-hero__decor {
    display: block;
  }

  .page-home .home-hero__visual {
    margin-top: var(--space-7);
  }

  .page-home .home-update__layout {
    grid-template-columns: minmax(160px, 1fr) 2.2fr;
    gap: var(--space-7);
    align-items: start;
  }

  .page-home .home-update__side {
    border-top: none;
    border-left: 2px solid var(--c-accent);
    padding-left: var(--space-5);
    padding-top: 0;
  }

  .page-home .home-quick__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-home .home-index__grid {
    grid-template-columns: minmax(200px, 1fr) 2.2fr;
    gap: var(--space-7);
    align-items: start;
  }

  .page-home .home-index__lead {
    position: sticky;
    top: var(--space-7);
  }

  .page-home .home-index__item {
    grid-template-columns: auto 1fr auto;
    align-items: baseline;
  }

  .page-home .home-index__desc {
    grid-column: auto;
    text-align: right;
  }

  .page-home .home-index__bottom {
    margin-left: 33.333%;
  }
}

@media (min-width: 1024px) {
  .page-home .home-section__head {
    gap: var(--space-6);
  }

  .page-home .home-section__head h2 {
    font-size: 2rem;
  }

  .page-home .home-section__head .home-section__desc {
    padding-left: var(--space-3);
  }
}