.page-home {
  --home-gold-grad: linear-gradient(135deg, #D4AF37 0%, #E8C96A 48%, #F2E0A0 100%);
  --home-purple-tint: rgba(91, 45, 110, 0.08);
  background: var(--c-ivory);
  color: var(--c-charcoal);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ===== 封面首屏：杂志式大标题 + 金色索引线 ===== */
.page-home .home-cover {
  position: relative;
  display: flex;
  align-items: center;
  min-height: clamp(640px, 94vh, 860px);
  padding: calc(var(--header-h) + var(--space-5)) 0 var(--space-5);
  background: linear-gradient(145deg, var(--c-violet-dark) 0%, #3A1D4E 52%, var(--c-primary-dark) 100%);
  color: var(--c-ivory);
  overflow: hidden;
  isolation: isolate;
}

.page-home .cover__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
  transform: scale(1.02);
}

.page-home .cover__inner {
  position: relative;
  z-index: 2;
  width: 100%;
}

.page-home .cover__grid {
  display: grid;
  gap: var(--space-5);
}

.page-home .cover__kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--c-gold-light);
  margin-bottom: var(--space-2);
}

.page-home .cover__title {
  font-family: var(--font-serif);
  font-weight: 200;
  font-size: var(--fs-hero);
  line-height: 1.06;
  letter-spacing: 0.01em;
  margin: 0 0 var(--space-4);
  max-width: 8em;
  text-wrap: balance;
}

.page-home .cover__title::after {
  content: '';
  display: block;
  width: 2.2em;
  height: 2px;
  margin-top: var(--space-3);
  background: var(--home-gold-grad);
  transform: skewX(-18deg);
}

.page-home .cover__lead {
  font-size: 1rem;
  line-height: 1.75;
  max-width: 34em;
  color: rgba(255, 255, 240, 0.88);
  margin-bottom: var(--space-4);
}

.page-home .cover__tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-home .cover__tools .btn-outline {
  border-color: rgba(255, 255, 240, 0.55);
  color: var(--c-ivory);
}

.page-home .cover__tools .btn-outline:hover {
  background: rgba(255, 255, 240, 0.12);
  border-color: var(--c-ivory);
}

.page-home .cover__index {
  border-left: 1px solid var(--c-gold);
  padding-left: var(--space-4);
}

.page-home .cover__index-label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold-light);
  margin-bottom: var(--space-3);
}

.page-home .cover__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-home .cover__index-list li {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-size: var(--fs-small);
  padding-bottom: var(--space-1);
  border-bottom: 1px solid rgba(212, 175, 55, 0.16);
}

.page-home .cover__index-num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-gold);
}

.page-home .cover__index-list a {
  color: rgba(255, 255, 240, 0.86);
  text-decoration: none;
  transition: color var(--transition);
}

.page-home .cover__index-list a:hover {
  color: var(--c-gold-light);
}

.page-home .cover__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-2);
  margin-top: var(--space-5);
  border-top: 1px solid rgba(212, 175, 55, 0.28);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: rgba(255, 255, 240, 0.62);
}

/* ===== 新版入口：葡萄紫大色块 + 斜置界面图 ===== */
.page-home .home-new {
  background: linear-gradient(180deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  color: var(--c-ivory);
  padding: var(--space-6) 0;
}

.page-home .home-new .section-index {
  color: var(--c-gold-light);
}

.page-home .home-new .section-title {
  color: var(--c-ivory);
}

.page-home .home-new .section-note {
  color: rgba(255, 255, 240, 0.7);
}

.page-home .home-new__grid {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.page-home .home-new__copy h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 400;
  color: var(--c-gold-light);
}

.page-home .home-new__copy p {
  color: rgba(255, 255, 240, 0.85);
  line-height: 1.75;
}

.page-home .home-new__copy a {
  color: var(--c-gold-light);
}

.page-home .home-new__btn {
  margin-top: var(--space-2);
}

.page-home .home-new__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 44px rgba(20, 4, 28, 0.45);
  transform: rotate(-1.5deg);
}

/* ===== 四栏目速览：纵向索引 + 卡片网格 ===== */
.page-home .home-columns {
  padding: var(--space-6) 0 0;
  background:
    radial-gradient(circle at 12% 20%, var(--home-purple-tint), transparent 18rem),
    var(--c-ivory);
}

.page-home .home-columns__filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0 var(--space-5);
}

.page-home .filter-pill {
  border: 1px solid var(--c-gray-deep);
  border-radius: 999px;
  padding: 0.45rem 1rem;
  font-size: var(--fs-small);
  text-decoration: none;
  color: var(--c-primary);
  transition: all var(--transition);
}

.page-home .filter-pill:hover {
  border-color: var(--c-primary);
  background: var(--c-primary);
  color: var(--c-ivory);
}

.page-home .home-columns__grid {
  display: grid;
  gap: var(--space-3);
}

.page-home .col-card {
  border: 1px solid var(--c-gray-deep);
  background: rgba(255, 255, 240, 0.9);
  padding: var(--space-4);
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-home .col-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px rgba(43, 21, 64, 0.1);
}

.page-home .col-card__num {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: rgba(212, 175, 55, 0.85);
}

.page-home .col-card h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.25rem;
  margin: var(--space-1) 0 var(--space-1);
}

.page-home .col-card p {
  font-size: var(--fs-small);
  line-height: 1.6;
  color: rgba(26, 26, 26, 0.75);
  margin-bottom: var(--space-2);
}

.page-home .col-card a {
  font-size: var(--fs-small);
  color: var(--c-primary);
  text-decoration: none;
  font-weight: 700;
}

.page-home .home-columns__stats {
  margin-top: var(--space-5);
  background: var(--c-green);
  color: var(--c-ivory);
  padding: var(--space-4) 0;
}

.page-home .home-columns__stats-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  align-items: center;
}

.page-home .home-columns__stats span {
  font-size: var(--fs-small);
  color: rgba(255, 255, 240, 0.82);
}

.page-home .home-columns__stats b {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-gold-light);
  margin-right: 0.3em;
}

/* ===== 大屏下载：金边实体卡 + 全景视觉 ===== */
.page-home .home-download {
  background: var(--c-gray);
  padding: var(--space-6) 0;
}

.page-home .home-download__grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.page-home .dl-card {
  background: var(--c-ivory);
  border: 1px solid rgba(212, 175, 55, 0.32);
  border-left: 4px solid var(--c-gold);
  padding: var(--space-4);
  border-radius: var(--radius-md);
}

.page-home .dl-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: white;
  background: var(--c-primary);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
}

.page-home .dl-card__version {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--c-primary);
  margin: var(--space-2) 0 0;
}

.page-home .dl-card__size {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 200;
  margin: 0;
  color: var(--c-charcoal);
}

.page-home .dl-card__desc {
  font-size: var(--fs-small);
  color: rgba(26, 26, 26, 0.72);
  margin-bottom: var(--space-3);
}

.page-home .home-download__visual {
  margin-top: var(--space-5);
}

.page-home .home-download__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glass);
}

/* ===== 旧版存档：暖灰底 + 档案时间轴 ===== */
.page-home .home-old {
  background: var(--c-warm);
  padding: var(--space-6) 0;
}

.page-home .home-old__grid {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.page-home .home-old__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: 0 16px 32px rgba(26, 26, 26, 0.12);
}

.page-home .home-old__content h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 500;
  margin: 0 0 var(--space-3);
}

.page-home .home-old__timeline {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-home .home-old__timeline li {
  display: flex;
  gap: var(--space-3);
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed rgba(26, 26, 26, 0.16);
  font-size: var(--fs-small);
}

.page-home .home-old__timeline li span {
  font-family: var(--font-mono);
  color: var(--c-primary);
  min-width: 5em;
}

.page-home .home-old__content > p {
  font-size: var(--fs-small);
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.8);
  margin-bottom: var(--space-3);
}

.page-home .home-old__btn {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

/* ===== 切换钮说明：深绿玻璃卡 ===== */
.page-home .home-switch {
  background: linear-gradient(135deg, var(--c-green) 0%, var(--c-green-light) 100%);
  color: var(--c-ivory);
  padding: var(--space-6) 0;
}

.page-home .home-switch__card {
  background: rgba(43, 21, 64, 0.55);
  padding: var(--space-5);
  max-width: 860px;
  margin: 0 auto;
  color: var(--c-ivory);
  border: 1px solid rgba(212, 175, 55, 0.22);
  backdrop-filter: blur(8px);
}

.page-home .home-switch__index {
  color: var(--c-gold-light);
}

.page-home .home-switch__title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: var(--fs-h2);
  margin: var(--space-2) 0 var(--space-3);
}

.page-home .home-switch__card p {
  color: rgba(255, 255, 240, 0.84);
  line-height: 1.75;
}

.page-home .home-switch__btn {
  border-color: var(--c-gold-light);
  color: var(--c-gold-light);
}

.page-home .home-switch__btn:hover {
  background: rgba(212, 175, 55, 0.18);
}

/* ===== 响应式：平板 & 桌面 ===== */
@media (min-width: 768px) {
  .page-home .cover__grid {
    grid-template-columns: minmax(0, 2fr) minmax(200px, 1fr);
    gap: var(--space-6);
  }

  .page-home .home-new__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

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

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

  .page-home .home-old__grid {
    grid-template-columns: minmax(200px, 1fr) 1.2fr;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-home .home-columns__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-home .home-download__visual img {
    max-height: 520px;
    object-fit: cover;
    width: 100%;
  }
}